| Insulin modulates inflammatory and repair responses to elastase-induced emphysema in diabetic rats. | |
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MedLine Citation:
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PMID: 21950537 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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As pulmonary emphysema and diabetes mellitus are common diseases, concomitance of both is correspondingly expected to occur frequently. To examine whether insulin influences the development of inflammation in the alveolar septa, diabetic male Wistar rats (alloxan, 42 mg/kg, i.v., n = 37) and matching controls (n = 31) were used. Ten days after alloxan injection, diabetic and control rats were instilled with physiologic saline solution containing porcine pancreatic elastase (PPE, 0.25 IU/0.2 ml, right lung) or saline only (left lung). The following analyses were performed: (i) number of leucocytes in the bronchoalveolar lavage (BAL) fluid of the animals, 6 h after PPE/saline instillation (early time point); and (ii) mean alveolar diameter (μm) and quantification of elastic and collagen fibres (%) 50 days after PPE/saline instillation (late time point). Relative to controls, alloxan-induced diabetic rats showed a 42% reduction in the number of neutrophils in BAL fluid, a 20% increase in the mean alveolar diameter and a 33% decrease in elastic fibre density in the alveolar septa. Treatment of diabetic rats with 4 IU neutral protamine Hagedorn (NPH) insulin, 2 h before elastase instillation, restored the number of neutrophils in the BAL fluid. The mean alveolar diameter and elastic fibre content in alveolar septa matched the values observed in control rats if diabetic rats were treated with 4 IU NPH insulin 2 h before instillation followed by 2 IU/day for the next 50 days. Density of collagen fibres did not differ between the various groups. Thus, the data presented suggest that insulin modulates the inflammatory and repair responses in elastase-induced emphysema, and assures normal repair and tissue remodelling. |
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Authors:
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Antonio Di Petta; Karin V Greco; Eveline O Castro; Fernanda D T Q S Lopes; Milton A Martins; Vera L Capelozzi; Luiz F P Moreira; Paulina Sannomiya |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-9-22 |
Journal Detail:
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Title: International journal of experimental pathology Volume: - ISSN: 1365-2613 ISO Abbreviation: - Publication Date: 2011 Sep |
Date Detail:
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Created Date: 2011-9-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9014042 Medline TA: Int J Exp Pathol Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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© 2011 The Authors. International Journal of Experimental Pathology © 2011 International Journal of Experimental Pathology. |
Affiliation:
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Heart Institute (InCor), LIM-11, University of São Paulo Medical School, São Paulo, SP, Brazil Department of Medicine (LIM-05-09-20), University of São Paulo Medical School, São Paulo, SP, Brazil Department of Pathology, University of São Paulo Medical School, São Paulo, SP, Brazil. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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